I'm a white startup founder in SV.
Systematic discrimination due to unequal access to infrastructure really, really sucks for the black community as a whole, but if you managed to overcome it as an individual there are multiple interrelated reasons why you have a massive advantage in startups/tech that you probably aren't aware of yet.
Firstly, the market is ruthless. You can't lie to yourself or others in a startup -- the thing you're doing really has to work, so the decisions you're making have to be right. You're white, had a great education, and a well-padded resume? If you don't make precisely the right choices, the market couldn't care less, your company will die. Now, white well educated people with well-padded resumes will probably have easier access to venture capital, but that brings me to my next point.
In my (totally unscientific) experience, skin color, education, and experience has no correlation whatsoever with fluid intelligence (essentially, how well you make decisions without knowledge). In a big company, fluid intelligence doesn't really matter all that much -- the culture is well established, you aren't that important, and if you can just play ball the way everyone else does, you'll do ok. Not so in a startup. In a startup you're dealing with completely new territory, so you have to figure things out from scratch, all the time. You might as well take your knowledge, and your experience, and your education, and throw it all away because it will make a zilch of difference. Fluid intelligence is everything because you have to figure everything out from scratch.
All the white, well-educated, experienced young men who have relatively easy access to VC capital? Without fluid intelligence and wits about them, they'll just burn through it and be left with nothing at the end. The market is ruthless -- it doesn't care. So you're on equal footing.
Finally, the space is hyper-competitive and even in a recession there is too much capital chasing too few good ideas. All those white, traditional, middle aged male VC partnerships really need a win. And I mean really, because if they don't get one they won't raise the next fund, and if they don't raise the next fund they won't be able to pay property taxes and their kids's private school tuitions, and they really, really don't want to end up there. Don't like black people? Have unacknowledged bias? Too bad -- your kids are going to public school next year. So if you come in with a killer idea and the seeds of a working business, you bet they'll invest. The pressure's too high not to. They might care what you look like, but the market doesn't care about them. The market is ruthless and indifferent, and forces them to act ruthless and indifferent, because if they act on their prejudices their fund will die.
This is getting a bit long, so here's my TL;DR: if you've been discriminated against your whole life and want to start a company, don't get discouraged. The market is ruthless and indifferent -- it doesn't care about you, or me, or anyone. For you, that's an advantage. Build something people want and you will be rewarded.